Lot 
Assuming a rate of steam consumption by engine, and an evaporative 
efficiency of the boiler which represent results obtained in fair, average 
practice, the heat losses disclosed by the preceding figures may be trans- 
formed into power losses, which are as follows: 
TABLE III. 
Horse- Power Equivalent of Heat Radiated from Boiler. 
BALM UOMeI a OCOMOLMVE Wa ba LES Gers creer ereycere ciel sie) sissies -ici aeisie. © 12 
Bare boiler, locomotive running 28.3 miles per hour...... 25 
Boiler covered with approved material in a manner com- 
mone to sood practice, locomotive at TeSt: 2... .2cs. +06. oe 4.5 
Boiler covered with approved material in a manner com- 
mon to good practice, locomotive running 28.3 miles per 
ligne. non oogsnpene se arrarahieouel o\ex a) sheiaeraiaialisiiate atch miage tate ete stateherelse’« 9.3 
Again, the results obtained afford a basis from which calculations may 
be made to show the extent of losses which will occur when the locomo- 
tive is run at higher speeds and under lower atmospheric temperatures. 
For example, it can be shown that had the boiler tested been run at a 
speed of eighty miles an hour under a steam pressure of 200 pounds, 
when the atmospheric temperature is 0 degrees, it would, if bare, have 
radiated an amount of heat which is the equivalent of sixty-seven horse 
power, and if covered in the most approved manner it would have radi- 
ated an amount of heat which is the equivalent of twenty-five horse 
power. 
It will be seen that the radiation losses are quite sufficient to merit 
the earnest attention of those interested in improving the performance of 
locomotives. 
Tue Leonrps or 1898. By Joun A. MILuEr. 
As the results of the observations of the Leonid shower of 1898, made 
at various places in the United States, are accessible, this note shall only 
have to do with the observations made at Bloomington, Indiana. 
We limited ourselves chiefly to two classes of observations. First, the 
determination of the number of Leonids that fell during certain periods 
of time between November 12 and November 19. We hoped from this data 
